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FooBarU2 t1_ja4qnxl wrote

Reply to comment by HarryBaughl in For birds all sex is anal sex. by Whats-Upvote

FYI, and as I am sure you know, mammals that have the dual plumbing ports (for liquid and solids... #1 and #2 respectively LOL) are called placental mammals.

And marsupial is the other referenced my my post along with odd monotremes which are how duck billed platypuses are categorized.

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HarryBaughl t1_ja506ov wrote

Interesting. I always thought that mammals and marsupials were different because of the lack of mammaries.

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